Question 1094289
Your h and k are correct.


{{{a(x-2)^2+3=y}}}
{{{a(x-2)^2=y-3}}}
{{{a=(y-3)/(x-2)^2}}}

known point (1,7)
{{{a=(7-3)/(1-2)^2}}}

{{{a=4/1}}}

{{{highlight_green(a=4)}}}